Overriding Overloading final

final

Java Of final and C Linguistic const Not very consistent
Java in final Any object used to decorate is declaring its reference immutable , Its value may change , It can be said that Java Medium final Decorated variables are equivalent to pointer constants （ A pointer , Its value is immutable , That is, the address pointed to is immutable ）
final Modifier class cannot be inherited
final Modifier methods cannot be overridden , But it can be overloaded

Method signature

Such as public int test(int, long, java.lang.String[])
You can see that the method signature focuses on the method name of the method 、 return type 、 parameter types 、 The order of parameter types , But I don't care about the formal parameter name of the method （ and C Agreement ）

Overriding rewrite

Method signature consistent
It is equivalent to overwriting the original method
Such as public int test(int a, long b, String c) and public int test(int d, long e, String f)

Overloading heavy load

Method signatures are inconsistent
A new way
Such as public int test(int a, long b, String c) and public int test(int a)

matters needing attention

In general, it is best to add... When overriding a method in inheritance @Override, Otherwise, it may be inadvertently written as overloaded